does the SFTP library provide the same syncing capabilities as the FTP library?
I found this example in the FTP section:
Synchronize Local Directory Tree (http://www.example-code.com/ios/ftp_syncLocalTree.asp)
This is exactly the functionality I need, but it has to be SFTP in my case.
Not yet. Chilkat also needs this for its own internal purposes, so it's high on our list. The upload synchronization feature for SFTP is available in v9.5.0, but the download sync implementation didn't make the deadline for v9.5.0.